The lowest level directories all contain mesh.json files, which describe a 3D mesh using a collection of basic polygons. Each level of the tree contains a descriptor polymeta.json file, which describes the directory.
The PolyMesh file format ( pmf) is a gzip file containing a structured directory tree of JSON files.
The PolyMesh file format and toolset are specifically designed for 3D rendering applications. PolyMesh is a custom 3D object description file format I designed as an experiment.